What is the best way to combat control in BU?

This may seem like a silly/simple question
1. Every played blue deck is usually control or aggro control.
2. I am in BU, so I should have the easiest time with these decks, you'd think.

But the particular deck I'm playing is one in which Force of Will, Daze, and Counterbalance, cannot be used. It's not intentional, it's just how the deck functions that repels all three.

So, I have about 8 open slots in the sideboard that I am trying to dedicate to do the maximum damage against decks that hold a lot of cards in their hand instead of playing things out on the board.

My main trouble is with control and aggro-control decks because all their cards are in their hand, and their board is represented only by land and their dreaded Mishra's Factory. Their only permanents are Standstill, Pernicious Deed, Explosives, etc. (The rest I can easily handle - I am much much better prepared to handle creatures - it's land, artifacts, and enchantments that get me.) The other problem is that they can easily remove my important creatures.

I am also referring to the GB and GBw and Pox and Stax decks when I say that I have trouble with control. They also have very very few creatures. I guess I am looking for a way to combat decks that use so few creatures.

The most obvious solution, of course, is discard. And I'd want the sideboarded in discard spells to do maximum damage to fulfill their purpose of being in the board, so my first thought is:

4 Hymn to Tourach
4 Augur of Skulls

I've also tried

4 Disrupt
4 Hymn to Tourach

4 Duress
4 Hymn to Tourach

4 Duress
4 Cabal Therapy (I actually have enough creatures to support it, but it never seems to do damage vs. control and aggro control, usually just combo slightly)

I am considering

4 Annul/Spell Snare/situational 1cc disruption
4 Hymn to Tourach

4 Bitterblossom
4 Hymn to Tourach/Augur of Skulls

Disrupt truly can be brutal, frustrating, at a small cost ...but other times, it just can't protect me in the early turns as I'm trying to play things myself. It is nice to be able to have a slight defense against combo before I get a second turn (unlike with the 8x Hymn approach) ...which is why I've also tried Duress.

As a replacement to Duress/Disrupt, another thought is Annul. Annul helps because I'm usually most afraid of Artifacts and Enchantment spells, but it is almost dead vs. combo.
Pros - makes them pay for the full spell (as does Disrupt), where with Duress they don't have to play it in the first place.
Cons - can't disrupt Instants and Sorceries

A huge problem with Annul, Spell Snare, and situational 1cc counters sometimes only hit 4-8 cards in the opponents deck, which is sometimes not enough to be worth sideboarding in by a narrow margin... so you end up having to just not sideboard it in. (Like it not being worth it to bring Pithing Needle in against a deck with only 1-2 targets/unimportant targets)

I am leaning towards 4 Hymn 4 Augur.
Pros - best option vs. control and aggro control, decent choice against combo
Cons - not the best option vs. combo because they may combo turn 1, also vulnerable to Spell Snare

If you were playing Landstill or Threshold or ITF or Team America or Dreadstill or Pox or The Rock or Stax... which 8 cards would be the biggest threats you'd 'fear' postboard?

Large amounts of discard
A bit of discard and a bit of trickiness
A bit of targetted specific discard and a bit of mass discard
A one mana counterspell for your Artifacts and Enchantments and a bit of mass discard
A bit of mass discard and a pesky threat-producing 1B enchantment